<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
	<title>Mixer</title>

	<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
	<link rel="icon" type="image/png" sizes="174x174" href="./favicon.png">

	<script src="https://cdnjs.cloudflare.com/ajax/libs/webcomponentsjs/2.4.3/webcomponents-bundle.js"></script>
	<link href="https://fonts.googleapis.com/css?family=Material+Icons&display=block" rel="stylesheet"/>
	<script src="../build/Tone.js"></script>
	<script src="./js/tone-ui.js"></script>
	<script src="./js/components.js"></script>
	<style type="text/css">
		#tracks {
			display: flex;
		}
		#tracks tone-channel {
			flex-grow: 1;
			margin: 5px;
			width: 20%;
		}
	</style>
</head>
<body>
	<tone-example label="Channel">
		<div slot="explanation">
			<a href="https://tonejs.github.io/docs/Channel">Tone.Channel</a> provides a simple channel interface. It allows for panning and volume changes as well as the ability to <a href="https://tonejs.github.io/docs/Solo">solo</a> (exclude audio in other Tone.Channels). 
		</div>
		
		<tone-loader></tone-loader>
		<div id="content">
			<tone-play-toggle></tone-play-toggle>
		</div>
	</tone-example>

	<script type="text/javascript">
		function makeChannel(name, url, pan) {
			const channel = new Tone.Channel({
				pan
			}).toDestination();
			const player = new Tone.Player({
				url: `https://tonejs.github.io/audio/berklee/${url}.mp3`,
				loop: true
			}).sync().start(0);
			player.connect(channel);

			// add a UI element
			ui({
				name,
				tone: channel,
				parent: document.querySelector("#content")
			});
		}
					
		// create a meter on the destination node
		const toneMeter = new Tone.Meter({ channels: 2 });
		Tone.Destination.chain(toneMeter);
		meter({
			tone: toneMeter,
			parent: document.querySelector("#content")
		});

		makeChannel("Guitar 0", "comping1", 1);
		makeChannel("Guitar 1", "comping2", -1);
		makeChannel("Guitar 2", "comping3", 0.25);
		makeChannel("Guitar 3", "comping4", -0.25);

		document.querySelector("tone-play-toggle").addEventListener("start", () => Tone.Transport.start());
		document.querySelector("tone-play-toggle").addEventListener("stop", () => Tone.Transport.stop());
	</script>
</body>
</html>
